Combination brace and drill



Patented Apr. 19, 1927. i

, UNITED STATES PATENT ()FFICE.

CHARLES W. BEAMER, OF TONOPAH, NEVADA. 4

COMBINATION BRACE AND DRILL.

Application filed June 9,

This invention relates to an improved tool, and it has more specificreference to an improved structure.including a brace, and an improveddrill attachment therefor.

Briefly, the brace is of conventional design with the exception of asocket which is formed in the inner end of the chuck. The drill braceattachment, however, is modified to make a substantially improved onewhich may be used in the form of an attaclt ment to be applied to orremoved from the brace as conditions require. A special clamp to a partand coupling is simply provided for connecting the shaft of the drillbrace attachment of the brace, and the driving pinion is modified toafford a driving connection with the improved brace chuck.

My principal aim is to provide a combination device of this kind to makefor convenience and compactness and to afford the use of the well knownconvenient breast support of the brace for producing a firm andefficient support for the drill.

Other objects and advantages of the invention will become apparent fromthe following description and drawing.

In the drawing Figure 1 is a view which is mainly in full elevation,with portions of the parts broken away and shown in section to disclosethe construction clearly.

Figure 2 is a section taken approximately upon the plane of the line 22of Figure 1 looking in the direction of the arrows, and

Figure 3 is also a section taken upon the plane of the line 3-3 ofFigure 1, looking in the direction of the arrow.

Referring to the drawing in detail, the reference character 1 designatesgenerally the brace, and the reference character 2 the 7 improved drillbrace attachment for said brace.

The brace embodies the usual breast rest or plate 3, a U-shaped portionl, a hand grip 5, pawl and ratchet mechanism 6,. knurled bushing 7, andcustomary tool chuck 8. As before stated, the only real change in themake up of the brace is the provision of a polygonal socket in the innerend of the chuck. It might be stated in this connection. however, that aspecial clamp 9 is provided and this is of a two-part construction andthe parts are firmly clamped about the bend in the brace adjacent thebreast plate 3. As indicated in dotted lines this 1926. Serial No.114,734.

clamp includes a polygonal projection 10 which is formed integraltherewith.

As for the drill brace attachment, this comprises a beveled gear 11, anoperating crank 12, a hand grip 13, and shaft 14, Mounted for rotationupon the reduced end of the shaft is a beveled pinion 15 which mesheswith the teeth of the beveled gear 11, and it will be noted that thispinion is provided with a polygonal extension 16 which fits into thesquare socket in the adjacent end of the chuck 8, thus providing adriving connection between the pinion and the chuck, the power beingreceived from the beveled gear. The reference character 17 designates asleeve, having a square socket formed in its outer end as shown at 18 inFigure 3. Obviously, this socket serves to receive the aforesaidcorrespondingly shaped extension 10. In the opposite end of the sleeveone end of the shaft 14 is fitted for rotation. As shown plainlv inFigure lin dotted lines at 18, a set screw is carried by the sleeve 17and fits into a recess formed in the telescoping end of the shaft 14-.Then too, a coiled spring 19 surrounds this portion of the shaft,bearing at one end against the sleeve and at its opposite end against anappropriate shoulder on the shaft. 1 would direct attention to the factthat the set screw and groove connection 18 is such as to permit slidingof the sleeve in a direction from right to left against the tension ofthe spring 19 to permit separation of this novel coupling.

It is obvious that when it is desired to bring the drill 2 into play, itis associated with the brace as shown plainly in Figure 1. In doing thisit is only necessary to seat the extension 16 in the square socketformed. in the chuck 8. Then the sleeve 17, which is milled on itsexterior is grapsed and moved in a direction from right to left againstthe tension of the spring, permitting the opposite socket carrying endto be snapped onto the aforesaid extension 10 on the clamp 9. This holdsthe drill in place in the U-shaped portion of the brace. Obviously, thenit is operated in the usual way through the medium of the crank whileusing the brace as a firm support for it.

The advantage of this combination of parts will be plainly obvious tothose skilled in the art to which the invention relates. Moreover, thespecific construction will be Ice clear. as will he the operation andapplication and also remoral. it is therefore beliered that a morespecitic and detailed description is unnecessary While I have shown anddescribed the preferred embodiment of the invent-ion it is to beunderstood that minor changes (30111 ing Within the field of inventionclaimed may be resorted to it desired.

Having thus described the invention, What I claim as new and desire tosecure by Letters Patent is In a tool of the class described, incoinbinatioin a brace including the usual b shaped portion, paul andratchet mechanism, bushing. and chuck rotatably mounted in the bushing,said chuck being provided at, its inner end with a polygonal socket aclamp carried by a remote arm of the U- shaped portion oi the brace saidclamp beinn provided with a polygonal extension. a drill attachment forthe irace including a l' ereled gear. a shaftpriin'ided with means t'ormounting; said gear to rotate in a plane substantially parallel to saidshaitt a pinion rotatably mounted on one end of the shaft and u'ieshingwith the gear, said pinion being; provided with an extension fitting);into the aforesaid socket. a spring pressed coupling sleeve mounted uponthe opposite end of the shaft and provided with a polygonal socket forreception ol the correspondiugly shaped extension on said clamp.

2, In a tool. of the class described, in comhination, a brace includingthe usual U- shaped portion, pawl and ratchet mechanism, bushing, andchuck rotatabl mounted in the bushing. said chuck being; provided at itsinner end with a socket. a drill brace attachinei'it including abevelled gear, a sha it; provided with means, for mounting said gear torotate in a plane substantially parallel to said shaft, a pinionrotatably mounted on one end of the shaft and meshing; with the gem:said pinion being provided With an extension fitting into the. aforesaidsocket and a quick detachable coupling at the opposite end of the shaftand the adjacent, arm of said brace.

In testimony whereof I atlix my sigl'iature.

CHARL S \V. BEAZJER.

